Falakolaflak citadel, also known as Shapurkhast fortress, was built during the Sassanid era. During the Qajar era, it got the name of Falakolaflak, meaning the celestial spheres. The citadel is built on in the city of Khorramabad. In the past, there were twelve towers inside Khorramabad Citadel, only eight of which survived. Today, the citadel has become a symbol of Khorramabad city and Lorestan province.
The citadel was rebuilt during the Qajar period and during the reign of Fath Ali Shah. In ancient times and during the reign of the Sassanid dynasty, the citadel of Falak al-Aflak or the fortress of Shapurkhast was of great importance and Roman captives were imprisoned there. In the 10th century, it became the seat of the government of Al-Hasnawiyyah (ruler of Lorestan) and Ganjur during the time of Al-Buwayh. After that, for a while, it became the treasury of the Badr family and the seat of the government of the rulers of Lorestan. During the Pahlavi era, it was used as military barracks and a political prison.
Eventually, in 1970, Khorramabad Citadel was registered as a national monument and a few years later, it became a museum. In recent years, with the restoration of the exterior and interior of the citadel, archaeological and anthropology museums are housed in this historical-cultural complex.